1 Thessalonians 5:24

He who calls you is faithful; he will fulfil my prayer.

1 John 4:1-3

Do not believe every spirit, beloved, but test the spirits to see whether they are of God; for many false prophets are gone out into the world.

Revelation 2:2

I know your works and your toil and stedfastness, and that you cannot endure evil men, and that you tested those who called themselves apostles, though they are not, and how you found them false.

Treasury of Scripture Knowledge

Summary

And if thou say in thine heart, How shall we know the word which the LORD hath not spoken?

Bible References

General references

1 Thessalonians 5:24
He who calls you is faithful; he will fulfil my prayer.
1 John 4:1
Do not believe every spirit, beloved, but test the spirits to see whether they are of God; for many false prophets are gone out into the world.
Revelation 2:2
I know your works and your toil and stedfastness, and that you cannot endure evil men, and that you tested those who called themselves apostles, though they are not, and how you found them false.